Marathon Petroleum Corporation Spin-Off

Effective June 30, 2011, Marathon Petroleum Corporation was spun-off from Marathon Oil Corporation into a separate independent publicly traded corporation to holders of record of Marathon Oil Corporation common stock on June 27, 2011.

Additional general information about the spin-off and related transactions may be found in the Information Statement distributed to Marathon Oil shareholders in advance of the spin-off. See pages 1 through 5 of the Information Statement for Questions and Answers about the spin-off.